I'll have a different aproach to attract people to steem (blogs, news papers, youtubers, etc). I'd create a attribute url_reference. When a new post is written an a valid url_reference has been entered the payout will be distributed as follows: 1/3 for the author, 1/3 for the curators, 1/3 for the url owner.
In this way, blogger, youtubers, tweeterers, newspapers or companies can be rewarded just due to the fact that someone is pointing to your content from within a steem post.

This url owner rewards would be then automatically transfered to a steem account who identifies as legitime owner of the content refered by url_reference.

Legitimation could be also automated with the already known back-linking method.

The effect is that people still outside of the steem and even without knowing that steem or steemit exists could be earning rewards just due to the fact that steemit posts refering to their content are getting rewarded.

Imagine what would happen if, for instance, successfull youtubers discovered that they have hunderds of SBD waiting to be transfer to them as soon as they legitimate linking the refered steemit url on their youtube video

This also could created a sort of third rolle in steemit: referrers or reviewers or discoverers. . Authors who discover good content outside of steem and are also rewarded for it.